Plywood core machine



Jan. 2, 1945.

O. S. BOLL-ING PLYWOOD 4CORE MACHINE Filed ug. 16, 194] 12 Sheets-Shen??I 1 JzUe/Z for PLYWOOD CORE MACHINE Filed Aug. 16,' 1941 Flan 2, 1945. o. s. BoLLlNG PLYWOOD CORE MACHINE Filed Aug. 16, 1941 12 Sheets-Sheet 3 12T Il Jan. 2, 1945. Y o. s. BOLLING 2,366,588

PLYWOOD CORE MACHINE Jan. 2, 1945. Q s, BOLUNG 2,366,588

PLYWOOD CORE MACHINE Filed Aug. 1e, 1941 12 sheets-sheet 5 Jan. 2, 1945, Q BOLLlNG' 2,365,588

PLywooD CORE MACHINE Fi1ed`Aug. 16, 1941 12 Sheets-Shea?I 6 Jan. 2, 1945. Q s BOLUNG 2,366,588

PLYWOOD CORE MACHINE Filed Aug. 16, -1941 12 Sheets-Sheet 7 9 uw fw G Jan. 2, 1945. 1 l Q 4 s, BOLLING A 2,366,588

PLYWOOD CORE MACHINE Filed Aug. 1e, 1941 12 sheets-sheet 9 vma.

fraz/vizio?" Jan. 2, 1945. o. s. BoLLlNG PLYwooD' CORE MACHINE 12 sheets-shea 1o Filed Aug. 1e, 1941 ng l I Jv u v Jan. z, 1945. Q s BOLLING 2,366,588

PLYWOOD CORE MACHINE Filed Aug. 16, 1941 12 sheets-sheet 11 Patented Jan.`2, 1h45 "UNITED STATESv yPATENT N OFFICE.

e IfLYWooD CORE MACHINE Oscar S. Bolling,y Minneapolis, Minn., assignor to e Mereen-Johnson Machine Company, Minneapolis, Minn., a corporation of Minnesota l `Application `August 1s, 1941, serial No.i407`,147

eciaims. (ci. 144-2195 Mypresentinvention provides an `improved and highly jeflicient machine `for making sheets` l e from relatively narrow strips, slats or blocks of wood orlthe like. l

i The function of this machine is`to assemble and secure together, in glued condition, wooden strips, slats, blocks, or thelike, to;`produce com- `positewoodpanels that are suitable for various commercial iises, such as' for plywood cores. In the production of plywood, the composite panels l produced `by this machine will bensecured be-` i tween fwooden veneer" sheets, but these further operations are intended `to be performed by other or additional machines or devices.

In this improved machine, the wooden slats."

tween upper and lower hot plates which hasten i and insure th'edrying of theiglue andthereby the permanent `union of the slats in the'form of a continuous sheet.

After the core-forming sheet, made up of the connected slats, haspassed from between the hot plates, the edge or edges of` the sheet will be trimmed off `and the sheet given 'the proper pre- `determined width.` After "the edges of the sheets have `thusbeen trimmed, and `underautomatic action, the core-forming sheet will be transversely sawed or cut` sowthatcore-forming sheets or panels of the desired length, with respect to the directionof feed, will be delivered asa product ofthe machine.

Among the objects and accomplishments of my invention are asfollows: The provisionof an improved push feed mechanism; the `arrangementfor feeding` the `strips orstockin single or multiple rows; the improved form of hold-down or pressureybars with sharp blades or edges to prevent endwise shifting transversely'of the maychine of the stock strips; an improved arrangement whereby the motor-driven cut-off saw will. after it has made `its eross-cut. be raised` above itsoperativegposition while being returned; an

improved arrangement of and relation between the hold-down orpressure bars andthe push feed i "mechanism, `,whereby "buckling of the moving composite sheet, under the" action `of the push feed mechanism, will be eliminated; simple and `efficient arrangement'.` for yieldingly `supporting and adjustingthe upperhotplates; and electromagnetic means `forautomatically controlling the fabove indicated functions of themachine. These features will all more clearly appear in the del scription of the commercial machine illustrated in the drawings.

In carrying out these briefly indicatedoperations, I employ various novel and important in-` strumentalities, the preferred arrangement of which is illustratediin the accompanying draw-` ings which illustrateithe` commercial form of the machine and in which drawings like characters 'indicate like parts throughout the several views.

Referring to the drawings: e Y Fig. 1 is a View in perspective showing the complete machine looking'at the same `from the front or receiving end;

` Fig. 2 is a viewin perspective looking at the Hrnachinefrom the'rear or delivery end;

Figs. 3 and 3a are supplementalV plan views,

the said two views, when united on the broken linebmarked :11,-makin`ga complete plan View of the machine withsome parts broken away;

Fig. 4 is a fragmentary vertical section taken I on the line A-fof Fig. 3, the delivery end portion of the machine being brokenaway;

Fig. 5 is a transverse vertical `section taken on the line 5-5 of Fig, 3, some parts being broken away: f

Fig. 6 isa fragmentary transverse verticalsection, some oftheparts being sectioned on the irregular IinefB-B of Fig. 3 andvarious other parts being broken away, and lsome of the parts being `arbitrarily sectioneclcn a line varying somewhat from the said line B--6; 4 i Fig. 'l is la" transverse vertical section with various parts sectioned on the` irregular line l-l of Fig. 3 and with parts broken away;

Fig. 8 is a detailor fragmentary View taken in section on theI line`8--8 of Fig. 1 showing parts of thefeed mechanism, various parts being broken away;

Figf9 "is a detail in section taken on the linev 9--9 of Fig. 8

rFig. 1,0 isa vertical section taken onthe line Fig.A 1`1 isa fragmentary section-taken ori-the Fig. l2 is a fragm'entaryvertical section taken main frame 2|] by a hanger bracket 38.

Fig. 14 is a diagram showing the electric wiring of the electro-magnetic f the machine;

Fig. 15 is a fragmentary plan view showing the front or receiving end of the machine but illustrating a somewhat modified arrangement;

Fig. 16 is a View in side elevation but partly in vertical section taken transversely of the delivery end tof the ima;chine,but illustrating a modied structure or arrangement;

Fig. 17 is a vertical section taken on the line of Fig, 16; and

Fig. 18is a fragmentary section takenzapproximately on the line |8|8 of Fig. 3, 'someparts being omitted.

The complete machine, illustratedinlFigs. 1"to 14, inclusive, will first be described. All ofthe parts of this machine are mounteddirectly nrin topof-.thefframel `ll'heseestrip'swill-.bemlaced .on'ithe feed .tablefzl lwithL-:theirglue-coated .edges 4forward andj ust -insf-rontaof fan .edgewiserecpro- ,catingffeed Abarior lblade 22. .This .feedfbar'-22 is intermediately pivotedftafprojection Stof .azbarvlike .feed -head .2:4 1.that 'is :arranged -to slide on the projecting :ends .of guide .rails ..25 which, .like the table-forming bars 2|, are-rigidlyesecuredto the .top 1of the .framework 20 ,.hnt. project beyond the receivinrglendszofathe latter. Thezends-:of .the

Vbar-like 4feed :head ?.24 fare ,lpivotallyconnected to short links .'26 which, .-in iturnpare epivtoted .to .fthe lupper ends offa pair of ,levens'l, vthe.rlovvercends of whichlatter farefpivotedytofbrackets .-2.8 .xed

- on :thebaserof :the framework.

.-By `connecting.rods 23,=see ,particularly Fig. 4, the levers |211 are .intermediately `connected :to cranks SUXcarriedbs/.a transverse shaft 3| fjournaled in suitable :hearings 32 ron upright l.portions of the frame 20. The numeral 33 indicates a wheel iin therform'of ,asprocket which. is amounted on cranklshat 3|.. itiswdesired thatthefeed idevice frun fcnntinuously, thenssaidrspmcket 33 .fcould .f be Afrigid :on fsha'ft I.; .l.but.if..intermittent Vacftio-n l is desired, .a .trip clutch, lgenerally .indicated at 34 on Fig. 8,may:be-employed. 4'Ifhistriplclutch .'34` is/preferably vof vWellaknownv structure .and, if .used, would befmanuallyroperated throughaconnecting 1ink35 extended .fromzafoot .treadle 36. fPowerto.dri-vertice. feed device .through sprocket vv33 and crankfarms 30 ispreferably suppliedlfrom .fanelectric motor-31 -show.n.as supported-.fromme The-rotor shaft tof motor 37, .through worm gear .transmission, of usual or well-known arrangement but includingshaft 39,.see,particularly '.'Figs.-.4, 8.and 9, and intermediate transmissionmechanism, Vdrives sprocket y:3.3, and hence, the crankshaft 3 I The said intermediate transmission :mechanism, .see Tparticularly Fig.. 9, includes an .overloadslipclutch of the dise type whereintthegdiscsAOare keyed to .shaftg and areclampedbetween friction :plates -4| .of.a.hub-equippe.d with asprocket 42 lCshoWn operating mechanism as va double sprocket). A sprocket chain 43 runs over the sprockets 33 and 42. The frictional engagement between clutch disc and the flanges of the hub member 4| may be varied by springs 44 applied around and subject to tension of screw bolts 45. Sprocket equipped hub 4| is shown as provided with a trunnion 46 journaled in a bearing 41 secured on framework 20. The purpose of `ltlfiefrictional clutch described is to' prevent break- `age of parts but the clutch o`f course should be set with sufcient tension to transmit all the power necessary for normal operations.

.'Atzthis placeattention may be further called to the fact that the feed bar or blade 22, at its zeentrahportionfis 'provided with a barb 48 that 'will`b'efpressedinto the engaged strip and positively prevent endwise slipping thereof while it is beinglforceldlinto place. Also, it is important to note .that this feed bar is capable of oscillation 'to y"adapt itself to the surface of core-forming l.strips thattare ztapered. feed bar, :howeven is, yieldinglyheld in .a y position .at righteanglesfito the ydirection A.of longitudinal lfeediniovernent, fby means of quite loose coiled springs 49 :attached fthereto and .to 4the-.ends-.ofthe feedhead :24.

.As -a ymeans for .aligning .the ends .of the :coreforming `slats .or strips, .-I have :shown Aarmflike raligning `.gauges L50 mounted on .a Atransverse ...rod 5|, seeFigs. vl,4.and 5. Atitsendsrrod5|is.an vvchored in lbrac-:kets 52 .supported A-as presently '.to be described. The edgegauge's l5U .are..pi-votal1y Ymounted yon rod 5 `and. held .down .by-.gravity, `but are laterally vadjustable .bymeans iof `setescrewequipped collarsl53.

Locatedabove vthe-feed table,.f.made iup of the .skid .rails 2| .and extended .transversely -of :the machine, isVV a pair df:heavy,bridgegformingi channel beams 54 which, -at `their -.ends, are .rigidly -.securedtotie-plates.55,.as bestshown= '.outerfacesY ofthe platest. Rota-tively mounted in the `gear Lboxes r5.6 f are nut-.acting worm :gears 5l that work with threaded-engagement on :the -`threaded .upper v.ends .of supporting .posts 58, see ,particularly .Fig 6. .The .lower rends .of lthe fsup- .porting fpostsVo'f fwhich vthere are..four..in .the farrangement illustrated,are .mounted insIeeVeelike bearings 59 .that l.are rigidlyfsecured on fthe .side frame forming beams of the frameworkyZ-D. .The .nut-acting wormgears'l fare engaged byworms .60 .secured .in Y.tandem onshafts 6| flocated one .on `each side of .the machine. .These shafts .6|, .at .one end, Lare .shown as .connected yby miter lgears .62 to a transverse `adjusting .shaft w63 shown .in v`Fig. 3 .as `equipped at lone fend with 1a ...hand wheel,.64. f

.The .bridgeJoeams h54 .afford a.-rm butfadjust- .able support for rthe hold-down lorpressurefbars. Ihe `preferred .form of these .pressure bars .is shownin detail in Fig. 13 and, as preferabl-yzdesigned, involve -channel-shaped main body .por-

. .the .same down and tions 465 provided :at .their :sides fwith.1runner.act .ing .edge blades 36B, :the .knife sharp lower edge .of which V.projects .slightly '.belowrsaid main fbody .portions and `.engaging rthe `Wnrk .strips rto .hold

.prevent ,lateral shifting thereof. 'Ilhese Lblades 66 -are rigidly .secured `to .thes'ide anges nof .the lbody ,65 lby .means of .slot and .screw connections .61. The .front ...ends -.of .thebody .65 are ,preferably upwardlywbeveledtso .astofaclitatethe entry.oftheslManucure-formingstrips under .the same.;-and.'for.thesamemea- .sonthefront.endstoffthesharpedgespf theblades 66 are slightly rounded. .The .channel-shaped bodies 65'are rigidly secured tothe lower ends of plungers or A rods 88 that are `passed upward through the flanges of the bridge teams 54,. l `Nuts 89 on the upper ends of theplungers `(i8 limit the o downward movements of said plungers and the` pressure bars carried thereby. Coiled springs `on the plungers are compressed between nuts 1| adjustable on the plungers,`and the upper flanges ofthe bridgebeams 54. l l

The hold-down orl pressure bars 65-88ff`are preferably set parallel to and immediately over underlying members of the table-formingskid "frails'2|. l 1 best shown inFigA, thrust brackets 12are secured on top of the bodyportions of the pressure barsand these brackets are provided with adjustable stopsin the form of `screwsm13 that engagethe rear bridgefbeams 54 and resist endwisemovements of the `pressure bars rear-` ward under the frictional action thereon pro ducedwhen the core sheets are forced overthe feed table and under the said pressure bars. Means has already been `described for impart- "ing accurate vertical adjustments of the pressure u.bars in respect to the table-forming skid rails. However, it is sometimes desired to quickly move all of the pressure bars vertically into inoperative positions; and means for accomplishing this action isillustrated in Fig. 6` whereinthe lower portions of the,plungers 58` areprovided with i rack teeth engagedfby pinions 14 mounted in the bearings 59 and having projecting` arms 15. The

Apinions 14 and arms 15 aresecured` on" short shafts`16, see particularly Figs. `1 and 6. One of the]V arms 15 projects `upward and the 'other downward and these are connected by a linkj11,

ascenso through coils or pipes 82, whichlatter are, of

o course,.connected to a source of steam. Prefer- `ably,`the complete` hot plate structure is: made up of two sets, the one just noted, to wit: 88 and 8| and a `second or similar set of hot plates 88a and 8la.` The plates `8l and'la are in line or tandem and the plates 8|)` and 80a are inline or tandem. Steam pipes or coils'82a. are placed in the hollow hot plates 80a and`8la. For this structure see particularly Figs, 4 anar? The rlowerplates 80 and 80a rest upon and are `ditudinal beams or beams -of the main frame 20, as best s hown inFig. '1. `When the lower plates rectly andrigidly secured on the upper longiare very wide, they are trussed to prevent sagging at the transversely,centralportions by suit` able means such as truss members `83, the central `portions of whichbear against contactlugs `84 on the bottoms of said plates. The reduced ends as shown in Fig. 6. ,Alatch-equipped-lever 18 is i )applied to a projecting end ofone of the shafts 1 6. Lever 18 `will normally stand as shownin ',Fig.` 6 with `stop collars 19 thereof resting on f theupper ends of the bearings 59 and limiting the downward movementof the said posts, 58, f the bridge beams 54 andthepressure bars carried 4, bythe latter. ,to dotted line position, thesaid posts and parts When, however, lever 18 is moved supported thereby, including the p'ressure bars,

` will .be raised well above operative positions.

"It is important to note, see` particularly Fig. 3,

`that some `of `thehold-down or pressure lbars 55--56 project at their receiving ends farther i than others. With this arrangement the strips willjbe first forced under about one-,half of the pressure bars before `they are passed under., the

.other pressure bars and `before they comejinto engagement with and are subject to high resist- I tobe fed therethrough. In the normal or lower of the truss members 83 are shown as hung on nuts 85 of studs 86 that depend from bosses 81 on the bottoms of sid plates near the supported side edges thereof.' l

. Rigidly secured to the sides `of the lower hollow hot plates, two on each` side thereof, are outrigidly securedtothe front corners of the upper l o hot plate 8l andthe two rear boxes 9| are rigidly `secured tothe rear corners of thehot plate 81a.. With the arrangement above noted, theupper hotplates 8l `and 8Ia are normally sup-ported at a level just below the UDDQI" `plane of the stock position ofthe upper hot plates, the stop nuts 9D i rest upon the stop brackets 88`. However, when ance to rearward movement of the `composite 1,. sheet. This is, of course, the result of `extending at least sorne of the `hold-down bars far toward the front of the `machine and providing such a relatively `long stroke in the push feed mechanismfthat thefeed bar and fed in slats or stripswill be moved fullyunder the holddown bars before they engage the resistance of Jthmain sheet, and it is this feature which, enftirely eliminates any possibilityof `bucklingup ofl lthe ,assembled1` sheet-forming `slats at the infeed end `of the machine, especially when two` or more `strips are fed in at a time.

When the core, madeup of the slats," is forced `from between the` lower` skid rails 2l and .the

the core sheet stock isbeing passed between the upper and lower hot plates, the upper hotplates float `on and `exert their fullweight upon `the moving core sheet. `In this floating or raised position of the upper hot plates, the stop nuts 90 are raised from 4the stop brackets 88, as shown in Fig. 7.

To `guide the upper horizontally, either forward or `rearward or laterally, I `provide as simple means for that purpose vertically extended relatively long. guide `bars 93 rigidly secured to `the side lmer'nbersof thelframe "20. These guide bars` work betweenspaced lugs or straps 94 on the side edges of the upper hot plates or pans"8l `and Bla. Forthis last noted structure see particularly Figs. 1` and `3l C To prevent sagging of the upper hotplates, I`

provide truss devices,]such as best shown in Figs.

l 3,` l and 1, and which truss devices involve as follows:` the numeral 95 indicateslhorizontal truss overlying hold-,down or pressure bars 65-S 6,1it v will be forced between lower and upper hotplates y `8l) `and 81.` These hot plates,` asshown, are` of vrthin sheet metal and they areformed hollow and "are arrangedto be Lheated by steam Vdelivered beams which, at' their central portions, have aligning surfaces `9B that lap the joints between thehot plates 8|` and 81a. These aligning `surfaces are clamped together by bolts 91 applied through the flanges of` beam 95 and, as shown,

screwedinto `bosses `98 on the abutting ends of` the ,said upper plates. The truss bezalmsL 95, at

theirends are provided `with depending contact .y l screws 99 that bear against contact pieces l llse-v cured on the tops of the plates 8l and 8 la.` `When the screws 99 are tightened, they raiser the `truss .hot` plates for true `verticalY movements and tohold the sameagainst shifting ibeam's 95`f-:andrcause the nlatter "toliftmpward :on .the central portion lof thecomposite .upper :hot

plata-thereby preventing sagging thereof or at the ij'oint `between .the plates 8| rand-lila.v` ITo prevent transversefsaggingiof .thecomposite -orcomplete upper hot plates, 'I provide\.a ftransverse truss lbar or :member |01 which, a'sshown, .is much vlike the `lower truss-member 83 `but '.is reversed with respect thereto. The reduced ends f l.of this beam r|0| are equipped with adjusting screws l| 02 that bear againstcontactplates-|ril3-on .the q'tops Yof the -upper hot plates 8| and .A8-Ia.

'Hanger rods |04 anchored to `ythecentral portions of the transverse truss beams l0-I' are screwed into 4bosses .|05 .on the :topsof thetransyversely .'central portions 4of zthe said-upper ,hot

.plates .8| and talza. When the screwsr |02 .are tightened, Atruss `beam y|01 iwill be raisedand-.Will

y:pull upward -on the .hanger rods Jtland .on .the central portionsof the uppenhotplates ,andthere-f.: Vby .prevent -saggingthereoi Contact 4lugs |.0;6.-on

thetops of vtheplates 8:|.and.8f|,a engage athezends of the truss bars l and prevent turning thereof son ethe hanger bolts |04.

After the core, madeupcf-theconnected strips or slats,.has passed from between the lhot plates,

they are `forced rbetween the secondary feedntable l and over1ying secondary .pressure hold-down or .detaiL -and hence, the corresponding. v.parts .are .indicated by-the same characters with Vthe vadded prime marks. If, in reading the descriptionofthe -said primary table-forming andpressureor hold-` downdevices .they are read `with the yaddedprirne marks, they will fully describe .said secondary .feed table `and pressure devices. kIIoweventhe .function of theSeseCOndarydeViCes is tohold the Aassembled core-forming Astrips' tightly pressed .to-

`g'ether .after :the glue has been well heated .and

-while therstrips are cooling and .the vglue firmly "tzfi :ments unit-he .bridge MIL-are carrierzffranres .vor membersfm 5.- :In :the arrangement illustrated saws are provided-for trimminghothredgeslof the' corefsheet. Thesetrimming,saws,iwhicmare circular-.saws M6, are Vcarried vbythe rotorseoffelec- 'tricmotors :H1 that-,are supported .by tandaad- `ljustablewith the ycarrier vframes |.|.5. Byftlfleiisual f, or any lsuitable well-known fmeans, .these `anotors setting, Also, as will presentlyappear, these seof ondary devices hold thecoresheet firm while the edges of the core are being trimmed off .by the Y power-driven saws.

When .the core sheetpasses 01T .from thelower secondary table-'forming skid bars. 2| and from under the secondary .hold-down `orpressure bars BB., itpasses onto the finalskid bars |01 .that are v, mounted to slide laterallypn the Vupper flanges of*` transverse guide beams |08 that are `rigidly secured'to therearportion of the main frame20. On their under flanges the Lbeams |00 are vprovided with racks |09. Eachskid rail |01 has .depending'brackets |.I0 in the depending ends of which is journaled a shaft equipped with pinions ||2 that engage the racksl |709 of the several guide beams |108.. .Each `shaft l is shown as Vprovided with asquared end or shank to which an operating `crank |13 may be applied to adjust the several skid ,rails |101 laterally 'to correspond more or less closely to the width .of .the core sheet after it has been 'trimmed llcaymeans nextto be described. y

Extended-overandabove the skid rails |01 is aheavy bridgebeam |l4,'the endslof whichfare rigidlysecured :toupright posts or portionsof the [framewor-klll, seeparticular1yFigs. 1, 2 anda. ,"li/iountedforilateral sliding movements oradjustand.|34.

and saws are mounted for rb oth yelzticalfandflat- .eral adjustmentson the bridge .beamqlsl 4.

The core sheet, .as lit ismoved -onto the-.skid rails |01, `moves-.under and ispressedfdownward by leaf-like pressure springs ||8 thatiarewan- .chored on-and depend :from thebridgesbeam| I4. When the-core sheet'has rbeen iedthe-propendis- 1 tance for .the desiredy length rofcore section, A`the lsheet vw-l1 vbe transversely cut or severed by a-.out-

ofhsaw-whichwill :beautomatcally actuated-.and moved to produce the cutting action, at fa time when the I.feed movement lof :the :sheet Y.has .been stopped. This cut-offsaw .|19 .isalcirclesawlcarried bythe .rotor of vanelectric.motor 11.20. ihe frame of `motor |20 is rmounted `on .a .vertically movable supportf|2| .that is .pivoted ,at .|22 ,teva

carriage 2.3.mountedfto travel. on the .lower flange Y ofra .heavytransverse bridge beam |24,..theends of which are rigidly .connected tothe side.members of the main frame .20.by.heavy. ,Offsetbracke |25, see particularly Figs.,1, .2,.l3aiand 10.v

The pivoted ,lever-acting .support I2| for .the saw H9 .audits motor, fas preferably .formed iis provided withan upwardlyr extended arm .|2,|', see particularlyFigsl 10 and l1. Thearm-12|', at .its upper end, Vis `pivoted .on a .stud @|26 `Oia bracket or coupling .element I 2.1 .thai-,is firmly at- .tached to one Aofthe,linkslof,anfendless.Chain12.8 of the link `belt type. This carrier `chain is Varranged to runin lthe channelof .the transverse bridge. beam |24 and-to. run .overguide .wheels .|29 .and |30 that are in theform ,ofsprockets see .particularly Figs. 1 and Y10. The sprocket ,13.0, see Fig. 3a, is the .driving sprocketforchain |,28and itis securedon a shaft |3.| that extends thrQllgh the web of bridge bar Y|211 andis 'journalefd,in,a

Athrough ,reducing gears :ofwell-knownscommercial form ory any suitable -form not shown'in detailbut contained within a casing .131. A belt or sprocket chain |38 runs over the Spfockets |33 A guide vroller |39 is loosely journaled on 'the stud |25. As shownin Fig. 1l, asleeve-like-.bushing |40 is applied around the Ystud |26. [.This

l bushing |40 is `preferably rigidlysecured to the ,arm |2|' and the stud |26 is journaled therein while the .roller v |39 is journaled-on said stud throughthe medium of abushing ,M02

This ro1ler,|33 .is adapted. .to .run Pboth Aover and under a vguide rail .|,4,| that .isfrigidlymsecured `to the web ofthe bridge beam |24 insuch position that the roller |39.wil1..run,over thesameson its return movement of .the saw,but wi1l.run"un der said rail |4I 'and .upon .thelower ange of said bridge .beam .under thesaw .cutting move- .ment, allof 4whichwill more .fullyappearnthe description of the operation. For-,an important purpose, which will hereinafterappear, theuplper end of arm I2 l" is provided'with atriplluggorlpro- Vjection |42 that `is engageable vwiththe treegend of the arm 43 of a switch |44, which latter is diagrammatically indicated in lFig.1 14` and is illustrated as containedwithin a casing |45 `in Fig. 10. At this point it is only advisable to state that when the tripzlug |42 engages said switch arm |43,`the feed motor 31 will beV started. The feed belt |28 `is driven in the `direction of the arrows marked adjacent thereto in Figs. 1 and 10. With this arrangement, it is "evident that the saw ||9 will be lowered at `the limit of `its traveltoward the right, in respect to Figs. 1 and'l, and will. V be raised when it reaches the limit of `its travelv toward the left, in respect to said views.

When'the core sheet has reached the limit of` `its rearward movement and carried theVpredetermined desired `portion of the sheet past the transverse cutting Vline` of saw H9, it willengage the upstanding lug |46 'of a trip bar |41 that is supported for endwise movements by a pair of parallel links |48 and |49 which, as best shown in Figs. 2, 3a and12,.are,` at theirlower ends,

pivoted to one of the rear skid rails` |01. fTo make A the trip bar |41 adjustablefor different widths of `core sections to bereut 01T, said: bar is :shown as provided with slidable heads |50 clamped thereto by thumb-screws |5|. ATheupper ends ofthe links |48 and |49 are, inthis preferredarrangement, pivoted directly to the respective heads |50. Trip bar |41 is yieldingly pulled forward `by a suitable means such as a spring |52. A xed stop hot plates8| and 8|a. p

a General statementof. operation In this improved machine, as present designed for commercial purposes, Vthe several` operating motors described will be cut into and outl of4 action by electro-magnetic controlling mechanism which will presently be described, but before tracingin detail. this electro-magnetic control mechanism, it isthoughtdesirablelto state in advance c the timing` and order in which thelseveral `functions of the machine take place. c

The core-forming strips, with applied glue, will, as alreadytstated, be placed on the feed table,

" made upofithe skid rails 2|,`one or more thereof at a time.` Assuming that the motor 31 is in pin `|53 engages the link `|49 tolimit forward l movement of bar` |41. j The link` |49 is secured to and moves with an arm |54 so that `the said elements |49 and |54 constitute, in effect, `a bella crank lever. Arm |54 is engageable withan arm |55 of a limit switch |56, which latter isshown in diagramonly in Fig.` 14. t In Fig. 12 `switch |56 is action, then throughmhe clutchand transmission ,30"lmechanism already described and particularly shown in Figs. 8 and 9, each time that the foot treadle 36 isdepressed the feed bar 22 will be moved rearward and will force the slat or assembledslats under the pressurebars 65; Also, as

assumed to be in acasing |51 secured on one of the rails |01. Thisswitch V|56 is normally open and is yieldingly` biased toward its open position by a spring |55.` At this point it is desirable only to vfurther state that whentrip bar |41 is pressed l rearward by the core sheet, arm 54will be raised from its lower position, shown by full lines in Fig.`

12, to its upper position shownby `dotted lines in Fig. 12. Under thisupward movement of the arm `|54 of the bell-erariatm switch arm 1551s engaged by the free endlof arm |54 and moved already stated,the vslatorslats when placed upon the feed table will be aligned at least at one end by one or the other of the aligning gauges 50.'

Under repeated reciprocating movements of the feed bar 22 the assembled and aligned slats will be forced rearward between the'upper and lower hotplates and past the edge trimming sawsuntil theicore sheethas reached the point where it is to be cut off `by thetransversely movl able cut-olf saw ||9. At this point the rear edge from its lower switch open position, shown by full lines in Fig. 12, to its upper switchclosed` position, shown bydotted lines in Fig. 12.`` Byreference to the dotted line positions of Fig. 12, it will be seenthat the free. end of bellecrank arm |54 disengages the freeend of theswitcharm |55 bef,` fore the bell-crank arm |54 reaches its `upper,-`

most position andtherefore permtsimmediate return of the switch arm |55to its lower position and consequent immediate reopening of `switch l |56. As soon as the cut-olf length of core sheet isremoved, the trip bar |41`will be returned by spring |52 to its normal position, which will, in

turn, causethearm |54 to return to itslower norv mal position. In this connection it is important` to note that the Ybell-crank arm |54 is made up l of two partspivotally connected at |54, sothat the free end of thearm |54 is free' tomove pivotally in an upward direction to therebyclear the free end of the switch arm |55 and vassume its normal position below the free end of switch arm` |55 under returnmovements of the arm |54.

As previously noted, the upper hot platesare supported for vertical adjustments by the four elevator screwrods 89 and their collars 92.` For imparting like andsimultaneous rotary movements to the said four'screw'rodsil, they are `of the core sheet will engage the lug |46of the trip bar |41 and by forcing the latter rearward will close the limit switch |56 and this will simultaneously` cut the feed motor 31 out of action and close the' circuit through motor |36. The

cut-off saw I9 'may be "and preferably is constantly driven.

Fig. 10 shows thecutj-off saw in the position' l just after `ithas completed a transverse sawing movement but normally said `saw will stand in a raised position at the other side of t-he machinefso that when itis calledinto action to produce the next transverse sawing `of thevcore, it

. will onlymove slightly downward and will then be caused to travel on its lower `course across the core. In this movement the roller |39 will move under,` the rail |4| and thereby positively hold a the saw with its lower cutting edge below the level c or the Core. The dottediine position of the saw |`|9 in Fig. 10 showsthe said saw in its lowered `position. I H J When the saw has completed one cutting movel ment and starts back to its starting point,` the` lug |42, by engagement with the switch lever |43,"`

will close feedgmotorswitch |44 and again start thefeedmotor 31.` so :that thewfeed bar"will be again operated. Whenthe cut-olf motor car` `riage |23 brings 'the cut-off saw back tonormal itwill be; cut out of action` by electromagnetic" switch `elements presently to` or starting position,

be ,more fully deSGribet Shaft |63 is shown as journaled in brackets |64 on the boxes 9| andis provided with a hand wheel |65 for rotation of said shaft |63 to manually transmit vertical adjustments to the upper already-l indicated,` thef cut',I of section? of been removed,-the-lug |46 of the bar |41 will be .released so that said bar |41 and its bell-crank,

consisting 'of levers |49 and |54, will `be returned to'their normalv positions by spring |52;V in the*- m'a'nn'er previously described. However, if the Acut ofisection of thescoresheet is Snot ren:1'oved,-the'` push' feed--nie'chani'srn will continue to operate' and, providing that additional" slats or stripslarevfed into the machine, the coresheet'will continue to move rearwardly, which will cause lug |461 and bar |41? to* be carried'I rearwardlyand downwardly` to 4a"pc' sition whereinthe" top of# lug 46 is below the rearwardly-progressing core' sheet" This will resultin the feeding of acontinf uoizs"ribbori-ofv coresheet as long as'. the feed mechanism-continues to operate- In other'words;

the cutoffsectiori 'of core Sheetmustl'be'- retrievedY to render the cut-off saw feed motor' |36= autdk matically operative"atepredeterminedintervals? Electro-'magnetic controlla/stem iibuttonf1switchesthat are similari to'4 the' said' tactsofthe two'switch'es |88 and-|89"v are 'cone' nected to one of' the: right-hand-v contacts of'v switch |692 i The numerals 90 and :I 9| indicateother' push switches |861 and |892 Switch |96;- is fnormall'yf. open' and switch 19|] isfy normally closed'. One` contact of switch 90 :is connected Vto-l 'one ofl'ths: rightlhand contacts off-switch '|:10andlto oneo'f fthesupply. leads'fl 66. Onei contact of switch f 9 lll altemating' current delivered fro-mi a. three-phase -IBD to another one ofA the ,wiresof-Cthe power -is-f'connectedf toll onel off the lots/'erv contacts*y of 1 zolfvByf reference to Fig: 14 itl willfbe' noted thatin'L In connection with relay i switch'i |12; -tlli'ferei is'lv also provided anorma'llyl openlpush button switch l 92:. and a" normallyy closed push" button I swith" |93.\ Theseswitch'es#|92andll93 in cooperation j SoffwithlY thelrelay magnet. |122controlffthief-operationf and'theotheriterminaifofsaid coil, by a lead'fl 942,2

which,` by aplead! I965isi-connectedtoone'ofthe' right-handic'cntactsf of rela'yj'switch v |12'- and to one. of` thecontacts of if' the switch 44;* thet other contact ot saic'lswitczh` U14-beingconnected by4 a" lead ll 91 to-one'of thefsu'ppl-yfleadsd 661.

Asa the. initallsteplin startingtrie machine into' action, .puslibuttoti |92fis` closed thereby' through relay switch l 1 2lstartingl thefe'ed' motor 31 ntd action2.l Next,- pushlbutton-"llisclosed/'thereby through relay-` switch- |16 startingthe left-hand ytrinnn'iri'gsaw 'Iriotor`- ||1";land iffpush button" |90 be also closed; then" through?l right-hand relay" switenlll the right-hand-motor IH that actu'- ates the right-hand trimming saw-will also be starltediriltlacton: f The said'ileft-ha'hd trimming v sawfiiioto'rl willbe continuouslydriyeii until `norfmaiiyil' @rosee f-push' butwn- Switch' 1| s l f is open-edi and grit-'hand trimmingfsaw 'mo-tor will be cfmtihlollsly Operated Until nim'ally clsed" push4 button switch I9'|"i's openedf By pressing and handcontacts, andffto the left-hand contacts#|641v of' said' switch |61. The other contact: |841 is# connected by a lead |=toone ofv the left-hand`y y contacts Ofswitchl'sa; switenlserditerminatil ically shown in Fig. 14 is in Figs. 1, 2 and Sei-'cone tained in a housing 86 and its movable'l element is provided withan arm- |8'1that wil-libe engagedr` to vopen saidswitch |83' when thelugmlllonthe carrier chain- |28 engages said-armat a: timel when thecut-oIT saw'has aboutreachedi itsfnormal-return positionsaid, switch |83ma`y lieas#n sumedto be a yieldingly-v closedLswit'ch:

In'Fig;y 14A the numeral H-indicates: a' riore m'allyv open push button f switch i andi th'enurner'al |89 indicates a normallyclosed'E -push button' will be caused" to clo'se'thecircnit through rnotor..l l26that'rotatesthecut-oif saw 9i; 'arid'fthis sawA Will rbyefCiIltililOlSly T'Q'tlf 11i-itil 'nlliially cltlstd-y pshf'buttori switchv il $1" is" pressed andI openedl- WehenI switch' |66J is closed as" described by the action `io'fthe"trip barV 41', thefc'oil l'| 1 3"is energized?, thereby/freising the'i core' or switch` nel; clesinge switch` |854 and through' relayswit'ch |635 closing. the circuit" through motor' |36' Whichim-parts thetraveling' movements to the cutoifsawcarriage |23. n

IIfhe just above described raising ofrcore of-coi'l |13 whichl closed switch. |34.' 9pensv switch: |61 `,thereby breaking'th'e `circuit throlgfglncoil-V 181 f oil' 'relayswitch |1'2"with theresult that the core of switch |18 will drop andtherebyiopen the circuit f to feed motor `31 cutting the latterout of action. AWhen thecsawcarriage :with the cut-elisaw` hascompleted itsoperative travel` at the ulower.:1`

l position and `has started its return movement, the severed section of the core should be removed "the cut-off motor carriage |23 and when the latter has` aboutreached its initial or starting l position, the lug |42` will engage the actuating `arm |81 of switch |83 and automatically opens said switch stopping the travel of the cut-osaw by cutting out motor |36 through the action of relay switch |68. t y

In connection with the preferred form of the machine already described, itis important to` note that thefeed bar 22 is connected by an intermediate pivot to the feed head ormember 24 so that it will adapt itself to tapered slats or strips and produce `equal pressure on the same` cycleoff operation of the push feed mechanism," it` shouldxbe understood that continuousunin-` terrupted operation of the feed bar can be and.v C

often is ,obtained by suitably lockingor latch#` `ing of thel footpedal in `its depressed .position- HWhatIclaimisllwo n. n. .M

llfuIn azfmachine of the kind described; a feed table, pressureubars extended longitudinally of and overlying said table, means for feeding strips onto said 'table and under said pressure bars, said pressure bars comprising elongated main bodies and longitudinally extendingv runner-acting blades anchored Ato said main bodies, said runner-acting blades having sharp work-engaging edges that project below the bottoms of the main l bodies of the pressure bars and serve to prevent work strips from shifting edgewise transversely of the machine.

2. The structure :defined in claim 1 in which the runner-acting blades of said pressure bars are vertically adjustableA on the main bodies thereof. l r

3. In a machine of the kind described, a horizontal feed table, pressure bars extended longitudinally of and overlying said table, means for` feeding `strips onto said table and under said pressure bars, and which feed means includes a reciprocatinghead and a feed bar that isverat all points. In some cases it is desirable `to feed v the slats in two or more parallel series so as to simultaneously produce a plurality of core strips,

and amodifed form of the machine designed to accomplishthis result is illustrated in liig.l 15 wherein the slats are indicated by the character b. In this modified form the machine structure .is the same as that already described, except thatl instead of a single `feed bar,` two feed bars |98 ingly hold the feed bar L98 normally substantially f parallel to the head 24. The other parts of this machine being identical with those first described are designated by the same characters that are applied thereto in the earlier described structure.`

Figs. 16 and 17 illustrate certain modifications in which the main portions are identical with certain parts illustrated in the first instance and `which are indicated by the same or original characters.' In this modified arrangement there are *three cut-off saws v2|! on shaft 2.02 that are jourwith a pulley 206 and over whichpulleys `and a pulley 201 on the end of shaft 202 runs a belt 208.

The carrier belt |20V which corresponds to the belt |28 runs over a sprocket 209 and another sprocket,` not shown, and is driven through a tically pivoted to the head for horizontal swinging movements over the table to adapt itself to tapered strips as Well as strips with parallel edges.

4. Inra machine of the kind described, a horizontal feed table, pressure bars extended longitudinally of and overlying` said table, means for feeding strips onto said table and `under" said pressure bars, andvvhich` feed means includes a reciprocating head and a plurality of feed bars independently vertically pivoted to said head for horizontal swinging movements over the table to adapt themselves to tapered strips as well as strips with parallel edges,said pluralityof feed bars being operative to simultaneously feed a plurality of strips 'over said feed table and under said pressure bars. l l f 5. In a machine of the kind described, a feed table, a pressure baroverlying the feed table and extending longitudinally thereof@ means for feeding edge-glued strips onto the table and under the `pressure bar, said pressure bar comprising `an elongatedmain body and an elongated runprevent the work from shifting edgewise trans` verselyof the machine.

6. The structure deflnedin claim 4, in which there are a pair' of said runner-acting` blades sprocket chain 2|0 from a motor 2| shown as s mounted on one end of bridge beam |24.

The commercial form ofthe machine and certain modifications thereof `have been illustrated and described, but it will be understood that vertically adjustably anchored to opposite later- `ally `spaced sides of the main bbdy.

7. In a machine of the kind described, a feed table, laterally spaced pressure bars extending longitudinally of and overlying the feed table, each of said pressure bars having a longitudinally extended runner-acting" `portion `with a` p sharp work-engaging edge, and feed mechanism `for feeding strips onto the table and under said pressure bars, said feed mechanismcomprising a reciprocating head and a feed bar that extends transversely ofthe line of feed1 and is pivoted for oscillatory movements to the reciprocating head to `adapt itself `to tapered `strips as well as l to strips with parallel edges. l

8. The structure defined in claim '1, in which the `work-engaging face of the pivoted pressure bam prmfide Wi'thz as. Work@ engazghgbamb' Whi'trhz will;l cooperate: with the mrmeneafeting edgesoff theI pressure hairs tofy prevent lamervl: slippagex a edg-gledfsbrhs;

al. Im a;- maehine'; of thea- Iind desclzit'zed;a Erotik zontal feed table, pressure mechanismllbngitudl naHy overlying thea fee'da table, means: far :leedF ingf stringent@ `bhe. feed. table and-.under saiidl pressure mechanism; safdi feeding-'mams come? prsing a, retszlrocatngzV elementz'and. a: feed .ban

verticallypivotec thereto fophnrizontavlswingiug movements over the.A table: to.. adapt; itself. toltaperedsrps as. well as to Stnips; with; parallel",

edges. 

